code.delx.au - pulseaudio/blob - src/modules/module-lirc.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2005-2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30
  31 #include <lirc/lirc_client.h>
  32
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/namereg.h>
  38 #include <pulsecore/sink.h>
  39 #include <pulsecore/modargs.h>
  40 #include <pulsecore/macro.h>
  41
  42 #include "module-lirc-symdef.h"
  43
  44 PA_MODULE_AUTHOR("Lennart Poettering");
  45 PA_MODULE_DESCRIPTION("LIRC volume control");
  46 PA_MODULE_VERSION(PACKAGE_VERSION);
  47 PA_MODULE_LOAD_ONCE(true);
  48 PA_MODULE_USAGE("config=<config file> sink=<sink name> appname=<lirc application name> volume_limit=<volume limit> volume_step=<volume change step>");
  49
  50 static const char* const valid_modargs[] = {
  51     "config",
  52     "sink",
  53     "appname",
  54     "volume_limit",
  55     "volume_step",
  56     NULL,
  57 };
  58
  59 struct userdata {
  60     int lirc_fd;
  61     pa_io_event *io;
  62     struct lirc_config *config;
  63     char *sink_name;
  64     pa_module *module;
  65     float mute_toggle_save;
  66     pa_volume_t volume_limit;
  67     pa_volume_t volume_step;
  68 };
  69
  70 static void io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_io_event_flags_t events, void*userdata) {
  71     struct userdata *u = userdata;
  72     char *name = NULL, *code = NULL;
  73
  74     pa_assert(io);
  75     pa_assert(u);
  76
  77     if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
  78         pa_log("Lost connection to LIRC daemon.");
  79         goto fail;
  80     }
  81
  82     if (events & PA_IO_EVENT_INPUT) {
  83         char *c;
  84
  85         if (lirc_nextcode(&code) != 0 || !code) {
  86             pa_log("lirc_nextcode() failed.");
  87             goto fail;
  88         }
  89
  90         c = pa_xstrdup(code);
  91         c[strcspn(c, "\n\r")] = 0;
  92         pa_log_debug("Raw IR code '%s'", c);
  93         pa_xfree(c);
  94
  95         while (lirc_code2char(u->config, code, &name) == 0 && name) {
  96             enum {
  97                 INVALID,
  98                 UP,
  99                 DOWN,
 100                 MUTE,
 101                 RESET,
 102                 MUTE_TOGGLE
 103             } volchange = INVALID;
 104
 105             pa_log_info("Translated IR code '%s'", name);
 106
 107             if (strcasecmp(name, "volume-up") == 0)
 108                 volchange = UP;
 109             else if (strcasecmp(name, "volume-down") == 0)
 110                 volchange = DOWN;
 111             else if (strcasecmp(name, "mute") == 0)
 112                 volchange = MUTE;
 113             else if (strcasecmp(name, "mute-toggle") == 0)
 114                 volchange = MUTE_TOGGLE;
 115             else if (strcasecmp(name, "reset") == 0)
 116                 volchange = RESET;
 117
 118             if (volchange == INVALID)
 119                 pa_log_warn("Received unknown IR code '%s'", name);
 120             else {
 121                 pa_sink *s;
 122
 123                 if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK)))
 124                     pa_log("Failed to get sink '%s'", u->sink_name);
 125                 else {
 126                     pa_cvolume cv = *pa_sink_get_volume(s, false);
 127
 128                     switch (volchange) {
 129                         case UP:
 130                             pa_cvolume_inc_clamp(&cv, u->volume_step, u->volume_limit);
 131                             pa_sink_set_volume(s, &cv, true, true);
 132                             break;
 133
 134                         case DOWN:
 135                             pa_cvolume_dec(&cv, u->volume_step);
 136                             pa_sink_set_volume(s, &cv, true, true);
 137                             break;
 138
 139                         case MUTE:
 140                             pa_sink_set_mute(s, true, true);
 141                             break;
 142
 143                         case RESET:
 144                             pa_sink_set_mute(s, false, true);
 145                             break;
 146
 147                         case MUTE_TOGGLE:
 148                             pa_sink_set_mute(s, !pa_sink_get_mute(s, false), true);
 149                             break;
 150
 151                         case INVALID:
 152                             pa_assert_not_reached();
 153                     }
 154                 }
 155             }
 156         }
 157     }
 158
 159     pa_xfree(code);
 160
 161     return;
 162
 163 fail:
 164     u->module->core->mainloop->io_free(u->io);
 165     u->io = NULL;
 166
 167     pa_module_unload_request(u->module, true);
 168
 169     pa_xfree(code);
 170 }
 171
 172 int pa__init(pa_module*m) {
 173     pa_modargs *ma = NULL;
 174     struct userdata *u;
 175     pa_volume_t volume_limit = PA_CLAMP_VOLUME(PA_VOLUME_NORM*3/2);
 176     pa_volume_t volume_step = PA_VOLUME_NORM/20;
 177
 178     pa_assert(m);
 179
 180     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 181         pa_log("Failed to parse module arguments");
 182         goto fail;
 183     }
 184
 185     if (pa_modargs_get_value_u32(ma, "volume_limit", &volume_limit) < 0) {
 186         pa_log("Failed to parse volume limit");
 187         goto fail;
 188     }
 189
 190     if (pa_modargs_get_value_u32(ma, "volume_step", &volume_step) < 0) {
 191         pa_log("Failed to parse volume step");
 192         goto fail;
 193     }
 194
 195     m->userdata = u = pa_xnew(struct userdata, 1);
 196     u->module = m;
 197     u->io = NULL;
 198     u->config = NULL;
 199     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
 200     u->lirc_fd = -1;
 201     u->mute_toggle_save = 0;
 202     u->volume_limit = PA_CLAMP_VOLUME(volume_limit);
 203     u->volume_step = PA_CLAMP_VOLUME(volume_step);
 204
 205     if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "pulseaudio"), 1)) < 0) {
 206         pa_log("lirc_init() failed.");
 207         goto fail;
 208     }
 209
 210     if (lirc_readconfig((char*) pa_modargs_get_value(ma, "config", NULL), &u->config, NULL) < 0) {
 211         pa_log("lirc_readconfig() failed.");
 212         goto fail;
 213     }
 214
 215     u->io = m->core->mainloop->io_new(m->core->mainloop, u->lirc_fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
 216
 217     pa_modargs_free(ma);
 218
 219     return 0;
 220
 221 fail:
 222
 223     if (ma)
 224         pa_modargs_free(ma);
 225
 226     pa__done(m);
 227     return -1;
 228 }
 229
 230 void pa__done(pa_module*m) {
 231     struct userdata *u;
 232     pa_assert(m);
 233
 234     if (!(u = m->userdata))
 235         return;
 236
 237     if (u->io)
 238         m->core->mainloop->io_free(u->io);
 239
 240     if (u->config)
 241         lirc_freeconfig(u->config);
 242
 243     if (u->lirc_fd >= 0)
 244         lirc_deinit();
 245
 246     pa_xfree(u->sink_name);
 247     pa_xfree(u);
 248 }